She handed over the cash when approached by a man who appeared to be holding a gun at the Subway store about 6.30pm. The incident has raised concerns about how safe teenagers are when working in fast food outlets after dark.

CCTV images show a car that was used in an armed roobery in the drive-through of Subway on Aerodrome Rd at Maroochydore. Photo Contributed

A Kawana mother, who asked to remain anonymous, said she had feared for her daughter's safety when working at a different Subway branch on the Coast when she was 15.

"Not long after she started, they asked her to work the late shift and close shop," the mother said.

"At that time, there were reports of another store on the Coast being involved in a hold-up.